Reorganize Docker build infrastructure for better maintainability

- Restructure from ollama37/ to docker/ with clear separation
- Separate builder and runtime images into dedicated directories
- Group environment scripts in builder/scripts/ subdirectory
- Add comprehensive root-level README.md (257 lines)
- Add .dockerignore files for optimized build contexts
- Enhance shell scripts with shebangs and documentation headers
- Update docker-compose.yml to build locally instead of pulling
- Add environment variables for GPU and host configuration
- Remove duplicate Dockerfile and confusing nested structure

New structure:
  docker/
  ├── README.md (comprehensive documentation)
  ├── docker-compose.yml (local build support)
  ├── builder/ (build environment: CUDA 11.4 + GCC 10 + Go 1.24)
  │   ├── Dockerfile
  │   ├── README.md
  │   ├── .dockerignore
  │   └── scripts/ (organized environment setup)
  └── runtime/ (production image)
      ├── Dockerfile
      ├── README.md
      └── .dockerignore

This reorganization eliminates confusion, removes duplication, and
provides a professional, maintainable structure for Tesla K80 builds.

docker/builder/Dockerfile

@@ -0,0 +1,51 @@
+FROM rockylinux/rockylinux:8
+
+# Update OS and install cuda toolkit 11.4 and nvdia driver 470
+RUN dnf -y update\
+    && dnf -y install epel-release\
+    && dnf -y config-manager --add-repo https://developer.download.nvidia.com/compute/cuda/repos/rhel8/x86_64/cuda-rhel8.repo\
+    && dnf -y module install nvidia-driver:470-dkms\
+    && dnf -y install cuda-11-4
+
+# Post install, setup path    
+COPY cuda-11.4.sh /etc/profile.d/cuda-11.4.sh
+
+# Install gcc 10
+RUN dnf -y install wget unzip lbzip2\
+    && dnf -y groupinstall "Development Tools"\
+    && cd /usr/local/src\
+    && wget https://github.com/gcc-mirror/gcc/archive/refs/heads/releases/gcc-10.zip\
+    && unzip gcc-10.zip\
+    && cd gcc-releases-gcc-10\
+    && contrib/download_prerequisites\
+    && mkdir /usr/local/gcc-10\
+    && cd /usr/local/gcc-10\
+    && /usr/local/src/gcc-releases-gcc-10/configure --disable-multilib\
+    && make -j ${nproc}\
+    && make install
+
+# Post install, setup path
+COPY gcc-10.sh /etc/profile.d/gcc-10.sh
+COPY gcc-10.sh /etc/ld.so.conf.d/gcc-10.conf
+
+# Install cmake
+ENV LD_LIBRARY_PATH="/usr/local/lib64:/usr/local/cuda-11.4/lib64"
+ENV PATH="/usr/local/cuda-11.4/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
+RUN dnf -y install openssl-devel\
+    && cd /usr/local/src\
+    && wget https://github.com/Kitware/CMake/releases/download/v4.0.0/cmake-4.0.0.tar.gz\
+    && tar xvf cmake-4.0.0.tar.gz\
+    && mkdir /usr/local/cmake-4\
+    && cd /usr/local/cmake-4\
+    && /usr/local/src/cmake-4.0.0/configure\
+    && make -j ${nproc}\
+    && make install
+
+# Install go
+RUN cd /usr/local\
+    && wget https://go.dev/dl/go1.24.2.linux-amd64.tar.gz\
+    && tar xvf go1.24.2.linux-amd64.tar.gz
+
+# Post install, setup path
+COPY go-1.24.2.sh /etc/profile.d/go-1.24.2.sh
+ENV PATH="$PATH:/usr/local/go/bin"